//------------------------------------------------------------------
//
//------------------------------------------------------------------
#property copyright "www.forex-tsd.com"
#property link      "www.forex-tsd.com"


#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1  Lime
#property indicator_color2  Red

//
//
//
//
//

extern int    Otstup           = 5;  //Step back.
extern double Per              = 5.0; //Period.
extern string note             = "turn on Alert = true; turn off = false";
extern bool   alertsOn         = true;
extern bool   alertsOnCurrent  = true;
extern bool   alertsMessage    = true;
extern bool   alertsSound      = true;
extern bool   alertsEmail      = false;
extern string soundfile        = "alert2.wav";

extern string note7            = "Arrow Type";
extern string note8            = "0=default,1=Thick,2=Thin,3=Hollow";
extern string note9            = "4=Round,5=Fractal,6=Diagonal Thin";
extern string note10           = "7=Diagonal Thick,8=Diagonal Hollow";
extern string note11           = "9=Thumb,10=Finger";
extern int    ArrowType        = 2;
extern int    arrowthickness   = 2;

//
//
//
//
//

double CrossUp[];
double CrossDn[];
double trend[];

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int init()
{
   IndicatorBuffers(3);   
   
   if (ArrowType == 0) {
   SetIndexBuffer(0, CrossUp);   SetIndexStyle(0,DRAW_ARROW,0,arrowthickness); SetIndexArrow(0,119);
   SetIndexBuffer(1, CrossDn );  SetIndexStyle(1,DRAW_ARROW,0,arrowthickness); SetIndexArrow(1,119);
   }
   if (ArrowType == 1) {
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 233);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 234);
   }
   else if (ArrowType == 2) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 225);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 226);
   }
   else if (ArrowType == 3) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 241);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 242);
   }
   else if (ArrowType == 4) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 221);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 222);
   }
   else if (ArrowType == 5) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 217);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 218);
   }
   else if (ArrowType == 6) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 228);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 230);
   }
   else if (ArrowType == 7) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 236);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 238);
   }
   else if (ArrowType == 8) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 246);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 248);
   }
   else if (ArrowType == 9) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 67);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 68);
   }
   else if (ArrowType == 10) { 
   SetIndexBuffer(0, CrossUp);  SetIndexStyle(0, DRAW_ARROW,0,arrowthickness); SetIndexArrow(0, 71);
   SetIndexBuffer(1, CrossDn);  SetIndexStyle(1, DRAW_ARROW,0,arrowthickness); SetIndexArrow(1, 72);
   }
   
   SetIndexBuffer(2, trend);
   
   return(0);
}

//
//
//
//
//

int deinit() {  return(0); }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//

int start()
{
   int counted_bars=IndicatorCounted();
   int limit;
   
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
         limit=MathMin(Bars-counted_bars,Bars-1);

   //
   //
   //
   //
   //
   
   for (int i=limit; i>=0; i--)
   {
      double SHMax = High[iHighest(NULL,0,MODE_HIGH,Per,i)];
      double SHMin =  Low[iLowest(NULL, 0, MODE_LOW,Per,i)];
      trend[i] = trend[i+1];
          if (Close[i]>SHMax-(SHMax-SHMin)*Otstup/100) trend[i] = 1;  
          if (Close[i]<SHMin+(SHMax-SHMin)*Otstup/100) trend[i] =-1;   
             
          //
          //
          //
          //
          //
      
          CrossUp[i] = EMPTY_VALUE;
          CrossDn[i] = EMPTY_VALUE;
          if (trend[i] !=trend[i+1])
          if (trend[i] == 1)
                CrossUp[i] = Low[i] - iATR(NULL,0,20,i)/2.0;
          else  CrossDn[i] = High[i]+ iATR(NULL,0,20,i)/2.0;
         }
          
          if (alertsOn)
          {
          if (alertsOnCurrent)
               int whichBar = 0;
          else     whichBar = 1;

          //
          //
          //
          //
          //
         
          if (trend[whichBar] != trend[whichBar+1])
          if (trend[whichBar] == 1)
               doAlert("uptrend");
         else  doAlert("downtrend");       
   }
   
   return(0);
}
//+------------------------------------------------------------------+


void doAlert(string doWhat)
{
   static string   previousAlert="nothing";
   static datetime previousTime;
   string message;
   
      if (previousAlert != doWhat || previousTime != Time[0]) {
          previousAlert  = doWhat;
          previousTime   = Time[0];

          //
          //
          //
          //
          //

          message =  StringConcatenate(Symbol()," at ",TimeToStr(TimeLocal(),TIME_SECONDS)," SHI ",doWhat);
             if (alertsMessage) Alert(message);
             if (alertsEmail)   SendMail(StringConcatenate(Symbol()," SHI "),message);
             if (alertsSound)   PlaySound(soundfile);
      }
}